User Manual

GMC-I Messtechnik GmbH 5
1 Safety Features and Precautions
You have selected an instrument which provides you with a high
level of safety.
This instrument fulfills the requirements of applicable European
and national EC directives. This is confirmed by means of the CE
mark. A corresponding declaration of conformity can be
requested from GMC-I Messtechnik GmbH.
The device has been manufactured and tested in accordance
with safety regulations IEC 61010–1:2001/DIN EN 61010–
1:2001/VDE 0411–1:2002. When used for its intended purpose,
safety of the operator, as well as that of the instrument, is
assured. Their safety is however not guaranteed, if the instrument
is used improperly or handled carelessly.
In order to maintain flawless technical safety conditions, and to assure
safe use, it is imperative that you read the operating instructions
thoroughly and carefully before placing your instrument into service, and
that you follow all instructions contained therein.
Observe the following safety precautions:
• The instrument may only be operated by persons who are
capable of recognizing contact hazards and taking the appro-
priate safety precautions. Contact hazards exist anywhere,
where voltages of greater than 33 V RMS may occur.
Attention!
!
The calibrator has been designed for safe connection to
signal circuits.
Maximum voltage to be applied between the connector jacks (8)
is 27 V. If U
max
or I
max
is exceeded, the integrated 250 V
fuse is blown.
• Be prepared for the occurrence of unexpected voltages at
devices under test (e.g. defective devices). For example,
capacitors may be dangerously charged.
• Make certain that the measurement cables are in flawless
condition, e.g. no damage to insulation, no interruptions in
cables or plugs etc.
• Device functions may not be started in electrical circuits with
corona discharge (high-voltage).
• For this reason, it is imperative that a calibrator is never
confused with a multimeter.
• If necessary, use a multimeter to make sure that no danger-
ous contact voltages are present in the signal circuits to which
the instrument is to be connected.
• In order to prevent damage to the instrument, observe the
maximum allowable voltage and current values indicated at
the jacks.
With the exception of the resistance simulation and mA SINK
operating modes, the connected signal circuits should not
feed any voltage or current back to the calibrator.
In order to avoid damage to the instrument when interference
voltages are applied (within allowable limit values), the mA
SINK and mA SOURCE circuits are equipped with an fuse,
which makes this circuit highly resistive in the event that
excessive current should occur in case of a fault for the
duration of overloading.
Warning!
The instrument may not be operated in explosive
atmospheres, or connected to intrinsically safe electrical
circuits.